Can anyone give me some clue as to how the Domain of Definition stuff
works and affects various patches? Assuming it's that and not a bug
I've found... Unfortunately I've 'fixed' the composition and saved
over the old version, but here's a simplified version of what happened:
1st, I used Movie Loader to play a video. The video res was 784x576.
I used a Resize Image patch to resize to 320x240 (using stretch).
Outputting to a billboard, it was obviously working fine, and mouse-
overing the output showed the image size as 320x240.
I then fed the image into a render-in-image, set to 320x240, into an
iterator, and then into a CI Filter patch. There, I do some processing
based on the x coordinate of the image (nothing complex, just time
slicing by setting the alpha of all pixels outside the current column
to 0).
I pass the output of the CI filter to a billboard, set to render at
320x240, and connect the output of the render-in-image to another
billboard for display.
It all works as expected except for the coordinates in the CI Filter.
If I draw a vertical line at x=160, I should see it in the middle of
the image, but instead I see it 1/3 across. The centre is actually at
x=196, and the far right is at 392. This is exactly half of the
original video resolution, but the input image is definitely 320
pixels wide. Why?
I also noticed that if I moused over one port (think it was the input
to the render in image) it said it was a rectangle, with coordinates
matching the original video size, but the other end of the wire showed
the expected 320x240. Is this somehow expected?
Anyway, to fix it, I passed the resized image to a billboard set to
actual size inside another render in image. The problem went away
immediately.
If this is DoD related, and somehow expected, I fear for my sanity
when I come to something more complex!
Chris
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